Method of making bucket-blanks.



PATENTED DEC. 24,. 1907. P. A. LORENZ.

METHOD OF MAKING BUCKET BLANKS.

APPLICATION FILED JUNE 5, 1905.

UNITED s r-Arne PETER A. LORENZ, Q11 CHICAGO, ILLIN;O1S.

METHOD OF MAKING B UOKET-BLAN KS.

Specification of Letters Potent;

Patented Dec. 24, 1 907.

ime M1 Jllnf. 5. 1905. Serial No. 263.748.

To all whom it may concern:-

it known that 1, PETER A. lionnnz, e I

i may be loldcd or sweged overtnc body to citizen of the United States oi" America, and

a resident of the city of Chicago, in the county of ook and State of Illinois, have invented a certain new and useful l nnmrvcmerit in Methods of lvloking Bu(cl-:elBlnnks,

. of which thei'ollowing a specification.

invention relates to the production of elevator buckets of the kind commonly kn own to the trade as Sole-1n buckets bottom,

These are made substantially in one piece which is so out and bent as to t'orm the front, back and ends of completed bucket;

' v the blanks 'for the above stated purpose in "on expeditious, simple and inexpmsive'monher and one which will present the greatest possible economy in the use or material from I WhlGll the sold blanks are lorined. By the -us e ;of my UDRTOVGQ method I LV'Olfl the slow and tedious process of shearingdghe blanks to 5 dies on the other.

npatt'ern on the one hand or the use of a mult plicity of complicated and. expensive 'I am also able to work f 1 material of a greater gage or thickness than s practicable by other means.

A pers'pectlveview' of a completed bucket 1s shown in'F- gure 1.; Fig. 2 shows 2. sheet of metal. from Wlnch certem portions have been out and removed, subsequent cuttings ,or shearings being indicated by dotted lines,

. Fig. 3 shows one of the completed blanks.

It will be noticed that the bucket illustrated in Fig. lupresents a curved or U.

shaped line in cross section, the lines of which separate or flare from the bottom to the top; also that theends have asunder flare.

blank from which such bucket may be formed 4 l is shown in Fig. 3 in which 1, 2,3 and 4 rep.- -resent respect vely the front, bottom, back end-end walls. -When the some is folded to make .the bucket shown in l the portion 1. forms-the top edge ofthe front, 3 the top ed "eof the'back', and t" the top edge of the on s. The portions 4 which "form the upper p .edgeof'the end walls should slant from the Y back toward the front, and the portions 5 lie flushwith the upper wall of the back, when 5 the Win 4 is to ded in position to form the end. l e edges 6 about and over which, the "end pie'ces'orywin s are folded div'ergefrom the bottom to t e tolp 'bhoket, establishin t of the completed e amount of flare which is given to the ends. Slots? partly The,

g separetc the wings from the bottom portion. setting free a portion ot such wings which supportel'iu strengthen theIs-tructure.

PIfUlNtlCtl. by following the steps set out in ininimum of time and waste, tt'strip of metal to the distance from if to 3. "lhe'iirst'step should be thatof cutting out a portion of the thereof.- The openings 10 so made andthe material removed. therefrom should corremoved portion should be straight lines crossportions sore-moved are placed in order-upon clin'ed to .the line Ant uniform 'zingles,;bu t elternately turnedto "the right or le'ftfo'r the purpose. hereinafter indio'at'edl', 'Whensuch provided from whiche number of completed buckets, corresponding to the openings, may be inede-by'sheerin'g from the edges into the openings 10 on the-line 12 Which should-be a prolongationofth'e. ends ofthe openings 10. As these ends are plecejd'at en angle. accordye'rgirig lines 6 of they body portion-of the cuts 7,7.

It will observed that by-yarying the of appropriate size end'-outline,-'the inclineblenk thereunder, :When. the proper incli the strip, but reversed t0: the -inclinntioncf Lhisspecificetion. liq produce them by the should be provided whose width corresponds openings have been made'a strip will-be thus tion of the axis 'ofthe openings to the axis of the strip may be obtained by'eppropriatelyi setting the geges'to direct thernotion ofth'e Blanks similar to the'one described may be I materialof the strip on the central line" spon'd-to-the lines 11 which outline the'lowe'r part of the'wings 4, and the ends of such re'v ing the-side ones as indicated. Whi1ethe;

the central axisA of. the strip; the'oxis of the openings themselves B, C, etc., should be .in-

ing to the alternate.dispositioncf-the openings; the edges thus completedlgive the diblank, whereby the end time of the-coin pleted bucket is'secur'ed. The blank can then be finally completcdby trimming off the corners on the lines 4/, Bend making the distance of the openings 10 in the bucket blank strip from each other the length of the v If the openings 10' are made, as I prefer to. make ;them,.b ya' punchnation is obtained for one opening the correspending inclination to the central .exis "of -b p n y be'obtained by 11 ingthe strip over'and advancing it iinder the dies until-operated u on thereby. Anda series'of openings wil thus be made; each.

having the proper inclination. The 'stri so formed can, by the subsequent steps 0 my rocess beconverted into completed and finished blanks.

. I claim and Patent:

desire to secure by Letters 1. The method of producing, from an elongated strip of metal, a seriesjof blanks of the character. described, which consists in form} ing a series of openings on the central line of the strip whos'e ends represent edges of the body portions of adjacent blanks and whose sides represent edges of the wing portions of :adjacent blanks, and then separating the blanks on the lines ofthe end portions of --sai openings prolonged. v p p The method of producing, from an elon; gated strip of metal, a series of blanks of the character-described, which consists in forming a series of openings on the central line of the strip whose ends represent edges of the body'portions of adjacent blanks and Whose sides represent edges of the end orwing portions of adjacent blanks, said openings being disposed at the same angle to the central line site directions, and subsequentlyse arat n the blanks by shearing on the lines o the en I portions of said openings prolonged.

3. The method of producing-from an elongated strip of metal, a, series of blanks of the character described, which consists in punching a series of openings on the central line of the strip, whose ends. represent edges of the body portions of adjacent blanks and'whose sides represent edges of the wing portions of adjacent blanks, separating the'blanks from each other and then trimming the upper edges of the wing portions. '4. The method of producing, from an elonor the blank but alternately inclined in op'poscribing witnesses.

gated stripof metal, a series of blanks ofthe character described, which consists in forming a series of openings on the central line. of

the strip, whose ends represent edges of the body portions of adjacent blanks and whose sides represent edges of thewing ortions of adjacent blanks, se arating the b anks from each other, then s caring the blanks adjacent 'to the junction of the wings with the body portion and thentrirnming the upper edges of the wing portions. 7 v v 5. The method of producing from an elongated strip of metal a series of'blanks of the character described, which ctinsists 'in I'O- ducingan opening on the" central line of the,

blank whose ends represent edges of the body portion of adjacent blanks and whose sides represent edges of the end or wing portions of adjacent blanks by feeding the strip to a punch of appropriate form at an angle to the axis of the strip, then turning the strip and Ifeeding the same to the said punchat-the same angle as bef0re,-wl1ereby,the adjacent openings are given the same an 1e to the axis 0 the strip, but oppositelyincined thereto,

then se arating the blanks from each other a on the nes'of the end portions of said cpe'n prolonged.

. n witness whereof I'have hereunto sub- 

